Days to Weeks Converter
Convert days to weeks instantly. Enter a number of days to get weeks by dividing by 7, plus a weeks-and-days breakdown and the reverse direction.
Updated 2026-06-14 · Free · No sign-up · Runs privately in your browser
Show the formula & steps
How the Days to Weeks Converter Works
This tool converts days to weeks and back, and also shows a weeks-and-days breakdown. Both are units of time, with one week defined as exactly 7 days.
The Formula
Weeks = days ÷ 7 Days = weeks × 7
To split a total into whole weeks and leftover days, take the whole number of weeks and treat the remainder as extra days.
Worked Example
Convert 30 days to weeks:
- Weeks = 30 ÷ 7 = 4.29 weeks
- In mixed form: 4 weeks and 2 days
Going the other way, 6 weeks in days:
- Days = 6 × 7 = 42 days
Days to Weeks Quick Reference
| Days | Weeks |
|---|---|
| 7 | 1 |
| 14 | 2 |
| 21 | 3 |
| 30 | 4.29 |
| 90 | 12.86 |
Why Convert Days to Weeks
Many timeframes are given in days but are easier to plan around in weeks, such as pregnancy milestones, medication courses, project deadlines and legal notice periods. A 90-day plan, for example, is just under 13 weeks, which helps you map it onto a calendar. The weeks-and-days output makes it clear how much time is left over after the whole weeks.
Frequently asked questions
How many days are in a week?+
There are 7 days in one week. So 30 days is about 4.29 weeks. To convert days to weeks, divide by 7.
How do I convert days to weeks?+
Divide the number of days by 7. For example, 30 ÷ 7 = 4.29 weeks. To reverse it, multiply weeks by 7 to get days.
How many weeks is 30 days?+
30 days equals about 4.29 weeks, or 4 weeks and 2 days. Since a week is 7 days, 4 full weeks make 28 days, leaving 2 extra days.
How do I show days as weeks and days?+
Divide the total days by 7 to get whole weeks, and the remainder is the leftover days. For example, 30 days is 4 weeks (28 days) plus 2 days.
How many weeks is 90 days?+
90 days equals about 12.86 weeks, or 12 weeks and 6 days. Many medical and legal timeframes are quoted in days, so converting to weeks makes them easier to picture.